Events from the year 1564 in Sweden

• Monarch – Eric XIV

• February - Sweden pillage the Norwegian provinces of Jämtland, Härjedalen and Trondheim.
• 19 February - Armistice between Sweden and Denmark-Norway in Swedish Estonia.
• 30–31 May - First battle of Öland (1564)
• 14 August – Swedish siege of Lyckå in Blekinge.
• 14 August - Action of 14 August 1564
• 24 August - Lyckå taken by the Swedes.
• 4 September - Sweden takes Danish Ronneby and massacres its inhabitants dubbed the Ronneby Bloodbath.
• June - Wedding between Princess Cecilia of Sweden and Christopher II, Margrave of Baden-Rodemachern.
• 27 September – Lyckås and Avaskär are burned by the Swedes who then evacuate Blekinge.
• 11–13 October – Danish attack on Kalmar repelled.
• 21 November – Peace treaty between Sweden and Russia, to last for seven years.

• 25 September - Magnus Brahe (1564–1633), Lord High Constable and Lord High Steward of Sweden (died 1633)

• October 9 - Nils Svantesson Sture, died in the Battle of Mared, part of the noble Sture family and Swedish military leader.
• September - Klas Kristersson Horn, part of the Swedish Navy